Support confirmation of international calls while on WFC only.

Add new carrier config which enables a confirmation message when the user
dials an international number while on WFC only.

Add new @hide PhoneNumberUtils method which is used to determine if a
number dialed is an international number.

Test: Manual, unit.
Bug: 33272455
Merged-In: Ia7ffe10eee7d782ddc3355db616af0a48f19556e
Change-Id: Ia7ffe10eee7d782ddc3355db616af0a48f19556e

3 files changed, 48 insertions, 0 deletions

diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 02774b319625..1076afc30192 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -1127,6 +1127,14 @@ public class CarrierConfigManager {
     public static final String KEY_SUPPORT_3GPP_CALL_FORWARDING_WHILE_ROAMING_BOOL =
             "support_3gpp_call_forwarding_while_roaming_bool";
 
+    /**
+     * When {@code true}, the user will be notified when they attempt to place an international call
+     * when the call is placed using wifi calling.
+     * @hide
+     */
+    public static final String KEY_NOTIFY_INTERNATIONAL_CALL_ON_WFC_BOOL =
+            "notify_international_call_on_wfc_bool";
+
     /** The default value for every variable. */
     private final static PersistableBundle sDefaults;
 
@@ -1332,6 +1340,7 @@ public class CarrierConfigManager {
         sDefaults.putStringArray(KEY_FILTERED_CNAP_NAMES_STRING_ARRAY, null);
         sDefaults.putBoolean(KEY_EDITABLE_WFC_ROAMING_MODE_BOOL, false);
         sDefaults.putBoolean(KEY_SUPPORT_3GPP_CALL_FORWARDING_WHILE_ROAMING_BOOL, true);
+        sDefaults.putBoolean(KEY_NOTIFY_INTERNATIONAL_CALL_ON_WFC_BOOL, false);
     }
 
     /**
diff --git a/telephony/java/android/telephony/PhoneNumberUtils.java b/telephony/java/android/telephony/PhoneNumberUtils.java
index 38cffae96132..2eba4021a2a7 100644
--- a/telephony/java/android/telephony/PhoneNumberUtils.java
+++ b/telephony/java/android/telephony/PhoneNumberUtils.java
@@ -1439,6 +1439,30 @@ public class PhoneNumberUtils
     }
 
     /**
+     * Determines if a {@param phoneNumber} is international if dialed from
+     * {@param defaultCountryIso}.
+     *
+     * @param phoneNumber The phone number.
+     * @param defaultCountryIso The current country ISO.
+     * @return {@code true} if the number is international, {@code false} otherwise.
+     * @hide
+     */
+    public static boolean isInternationalNumber(String phoneNumber, String defaultCountryIso) {
+        // If it starts with # or * its not international.
+        if (phoneNumber.startsWith("#") || phoneNumber.startsWith("*")) {
+            return false;
+        }
+
+        PhoneNumberUtil util = PhoneNumberUtil.getInstance();
+        try {
+            PhoneNumber pn = util.parseAndKeepRawInput(phoneNumber, defaultCountryIso);
+            return pn.getCountryCode() != util.getCountryCodeForRegion(defaultCountryIso);
+        } catch (NumberParseException e) {
+            return false;
+        }
+    }
+
+    /**
      * Format a phone number.
      * <p>
      * If the given number doesn't have the country code, the phone will be
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 8479f88a8217..20aa5ef743fb 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -780,6 +780,21 @@ public class TelephonyManager {
             "android.telephony.event.EVENT_DOWNGRADE_DATA_DISABLED";
 
     /**
+     * {@link android.telecom.Connection} event used to indicate that the InCall UI should notify
+     * the user when an international call is placed while on WFC only.
+     * <p>
+     * Used when the carrier config value
+     * {@link CarrierConfigManager#KEY_NOTIFY_INTERNATIONAL_CALL_ON_WFC_BOOL} is true, the device
+     * is on WFC (VoLTE not available) and an international number is dialed.
+     * <p>
+     * Sent via {@link android.telecom.Connection#sendConnectionEvent(String, Bundle)}.
+     * The {@link Bundle} parameter is expected to be null when this connection event is used.
+     * @hide
+     */
+    public static final String EVENT_NOTIFY_INTERNATIONAL_CALL_ON_WFC =
+            "android.telephony.event.EVENT_NOTIFY_INTERNATIONAL_CALL_ON_WFC";
+
+    /**
      * Response codes for sim activation. Activation completed successfully.
      * @hide
      */